ゾル-ゲル法により合成したMgTi_4(PO_4)_6粉体の焼結と焼結体の性質

概要

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A precursor gel powder with the composition of MgTi_4(PO_4)_6 (MTP) was prepared by the sol-gel process. This powder was amorphous up to 700℃ and changed into single phase MTP at about 800℃. The relative density of a sintered compact showed that the amorphous powder was more sinterable than the crystallized one. A sintered body with a 95% relative density was obtained from an amorphous MTP powder. Some precursor gels with excess amounts of P_2O_5(1-9 wt%) and MgO (0.1-3 wt%) were also prepared by the same process. A small amount of P_2O_5 and MgO did not improve the sinterability of the powder. A small amount of MgO, however, increased the bending strength. A relative density of 91% and bending strength of 150 MPa was obtained with an addition of 1 wt% of MgO.
社団法人日本セラミックス協会の論文
1992-08-01